Method for transmitting/receiving uplink control information and device supporting same in wireless communication system supporting unlicensed band

Abstract

Disclosed are a method for transmitting/receiving uplink control information between a terminal and a base station and a device supporting same in a licensed assisted access (LAA) system in which the base station or the terminal executes listen-before-talk (LBT)-based signal transmission. Specifically, disclosed are: a method for a terminal efficiently transmitting uplink control information to a base station when the terminal transmits the uplink control information to a transmission time interval (TTI) that is shorter than the length of one subframe; and a device supporting same.

What is claimed is: 
     
       1. A method of transmitting uplink control information, which is transmitted by a user equipment (UE) to a base station in a wireless communication system supporting an unlicensed band, the method comprising:
 configuring a physical uplink control channel (PUCCH) format which is applied according to a transmission time interval (TTI) length by the base station; and 
 transmitting the uplink control information in a subframe in which the uplink control information is to be transmitted using a PUCCH format which is configured according to a TTI length applied to the subframe. 
 
     
     
       2. The method of  claim 1 , wherein the configuring the PUCCH format which is applied according to the TTI length by the base station corresponds to receiving information on the PUCCH format which is applied according to the TTI length from the base station. 
     
     
       3. The method of  claim 1 , wherein a first PUCCH format is configured to a first subframe of which a TTI length corresponds to a length of one subframe, and
 wherein a second PUCCH format is configured to a second subframe of which a TTI length is shorter than a length of one subframe. 
 
     
     
       4. The method of  claim 3 , wherein the first PUCCH format corresponds to a PUCCH format 1, and
 wherein the second PUCCH format corresponds to a PUCCH format 4 to which rate-matching or puncturing is applied. 
 
     
     
       5. The method of  claim 3 , wherein the first PUCCH format corresponds to a PUCCH format 1/1a/1b/3, and
 wherein the second PUCCH format corresponds to a shortened PUCCH format 1/1a/1b/3 to which an OCC (orthogonal cover code) corresponding to a TTI length is applied. 
 
     
     
       6. The method of  claim 3 , wherein the first PUCCH format corresponds to a PUCCH format 2/4/5, and
 wherein the second PUCCH format corresponds to a PUCCH format 2/4/5 to which rate-matching or puncturing is applied. 
 
     
     
       7. The method of  claim 1 , wherein the uplink control information comprises at least one of acknowledgement/non-Acknowledgement (ACK/NACK) information, rank indicator (RI) information, and channel quality indicator (CQI) information. 
     
     
       8. The method of  claim 1 , wherein the uplink control information is transmitted via the unlicensed band. 
     
     
       9. A method of receiving uplink control information, which is received by a base station from a user equipment (UE) in a wireless communication system supporting an unlicensed band, the method comprising:
 configuring a physical uplink control channel (PUCCH) format, which is applied according to a transmission time interval (TTI) length, to the UE; and 
 receiving the uplink control information from the UE in one or more subframes using a PUCCH format which is configured according to a TTI length applied to the one or more subframes. 
 
     
     
       10. A user equipment (UE) for transmitting uplink control information to a base station in a wireless communication system supporting an unlicensed band, the UE comprising:
 a receiver; 
 a transmitter; and 
 a processor configured to operate in a manner of being connected with the receiver and the transmitter, 
 wherein the processor is configured to: 
 configure a physical uplink control channel (PUCCH) format which is applied according to a transmission time interval (TTI) length by the base station, and 
 transmit the uplink control information in a subframe in which the uplink control information is to be transmitted using a PUCCH format which is configured according to a TTI length applied to the subframe. 
 
     
     
       11. A base station for receiving uplink control information from a user equipment (UE) in a wireless communication system supporting an unlicensed band, the base station comprising:
 a receiver; 
 a transmitter; and 
 a processor configured to operate in a manner of being connected with the receiver and the transmitter, 
 wherein the processor is configured to: 
 configure a physical uplink control channel (PUCCH) format, which is applied according to a transmission time interval (TTI) length, to the UE, and 
 receive the uplink control information from the UE in one or more subframes using a PUCCH format which is configured according to a TTI length applied to the one or more subframes.